Skiving-machine



(No Model.) 2 Sheets-Sheet 1 M. CHASE 8v M. H. POSTER.

SKIVING MACHINE.

12$ -m MLL b Patented Mar. 15

TH: NORRiS PETERS co, PHQTc-LITNQ. WASNVNBTON, n cy (No Model.) 2 ShetsSh.e'et 2 M. CHASE & M. 'H.'POSTER.

SKIVING MACHINE.

Patented MaJr. 15,1898.

INVENTEBRE,

F -i W MILTON CHASE AND MATTHEW H. FOSTER, OF HAVERHILL, MASSACHU- SETTS, ASSIGNORS TO THE ROTARY COUNTER MACHINE COMPANY, OF

SACO, MAINE.

SKIVING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 600,768, dated March 15, 1898. Application filed November 21, 1896. Serial No. 612,962. (No model.)

To all whom, it may concern:

Be it known that we, MILTON CHASE and MATTHEW H. FOSTER, residing in Haverhill, in the county of Essex and State of Massachusetts, have invented an Improvement in Skiving-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to a machine or apparatus of that class known as skiving-machines, and is herein shown as embodied in a machine for skiving counters of boots and shoes,which machine is an improvement upon that shown and described in another application, Serial No. 580,989, filed by us February 27, 1896, and has for its object to provide a more eflicient machine for the purpose described.

One of the features of this present invention consists in a novel construction of the support for the matrix, whereby the latter may be more accurately adjusted with relation to the cooperating endless knife.

Another feature of this invention consists in providing the machine with a grinder for the circular or endless knife, whereby the latter may be ground on the machine.

Another feature of this invention consists in a novel feed mechanism for the counters to be skived.

These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1 is a side elevation of a counterskiving machine embodying this invention; Fig. 2, a detail in elevation with parts broken out of the endless knife and matrix and the driving mechanism for the latter; Fig. 3, a detail in plan view of the counter-feed to be referred to; Fig. 4, a detail in elevation and section of the presser mechanism; Fig. 5, details of the blank and counter to be referred to; Fig. 6, an end elevation of the machine shown in Fig. 1, looking toward the left; Fig. '7, a detail in elevation, partially broken out, of the matrix shown in Fig. 1; Fig. 8, a diametrical section on the line 8 8, Fig. 7; Figs. 9 and 10, sectional details to be re ferred to.

Referring to Figs. 1 and 6, Arepresents the main frame or support for the operative parts, which is provided at its upper end with bearings for the main shaft at, having mounted upon it suitable driving-pulleys a a a located within an opening a in the framework. The shaft a has fast on it at one end, which may be termed its inner end, the hub ofa substantially semispherical knife-carrier a suitably shaped on its inner circumference to receive a circular or hoop knife d having a cutting edge a and which projects in front of the carrier a to practically form an extension thereof. The circular or hoop knife a has cooperating with it a rotatable support or matrix for the counter-blanks to be skived, and in the present instance the rotatable support is shown as a wheel a having a portion of its periphery removed to receive a detachablematrix a, which is secured to the wheel a as by screws a so that the matrix a" may be removed, if so desired, to permit the substitution therefor of matrices for different sizes and shapes of counters. The matrix a on its periphery is shaped or made so as to form a recess a, which is of greater depth at its center and gradually merges with the periphery of the matrix a at the sides of the recess, so that a substantially wide scarf may be made at the longitudinal sides of the counter-blank after the manner represented by dotted lines in Fig. 5, the full periphery of the matrix being curved transversely (see Fig. 8) and of substantially the same curvature as the knife a.

The matrix support or disk a is rotatable in a plane substantially at right angles to the plane of rotation of the circular knife a and the said wheel or support is mounted on a shaft (1 having bearings in uprights a a, (see Figs. 1 and 6,) erected upon a plate or bar a (see dotted lines, Fig. 6,) which is movable in a frame or supporting-plate 0, provided with depending arms a" (x extended substantially at right angles to the plate or bar a and movable in suitable guideways in a frame (shown as a top plate a) erected upon a vertical plate or bar a which is movable in guideways 66 0. secured to or forming part of the main frame A.

The plate a is movable in avertical plane by means of a screw 04 extended througha lug (L on the main frame A and through a lug 0, on the plate a The frame or plate a is movable on the plate a, substantially at right angles to the movement of the plate (1 by means of an adjusting-screw a extended through a lug (0 011 the said plate and through a depending lug (L (see Figs. 1 and 6) on the under side of the plate a between the arms 66 01 and the plate or bar a is movable in the frame or plate (1- substantially at right angles to the movement of the plate a by means of an adjusting-screw to, extended through a lug C635 on the plate 00 and into a suitably-threaded socket in the end of the plate The plate a as above described, has erected upon it the uprights 0. ct, which support the shaft (1, upon which the matrix supporting wheel a is mounted, and from the above description it will be seen that the matrix-supportin g wheel is bodily movable or is adjustable within the hoop knife a in three different directions namely, first, radially in a vertical direction, effected by means of the adj usting-screw (1 second, axially in a horizontal direction by means of the adjusting-screw 0. and, third, radially in a horizontal direction by means of the adjusting-screw 61, The matrix-wheel a may be revolved, as will now be described.

The supporting frame or plate a has mounted upon it an upright a, forming bearings for one end of a shaft 00 having its other end supported in the upright 01 the said shaft having mounted upon it a large gear (1. and a small gear or pinion 0. (see Figs. 2 and 6,) which latter meshes with an intermediate pinion or gear a, which in turn meshes with a pinion or gear a, (see Fig. 2,) fast on the shaft Q13 of the matrix-supporting wheel. The large gear a meshes With and is driven by a pinion a on a shaft (0 having hearings in journal-boxes 0. c0 01?, the journal-box 60 being vertically movable in a suitable slot in the upright frame a and the j ournal-boxes a a being vertically movable in suitable slots in the uprights ct a, the said journal-boxes being normally held stationary by suitable springs a located above them, as represented in Fig. 1, and adapted to be acted upon by adjusting-screws a at a, by which the tension of the said springs may be regulated.

The springs a permit the shaft a to have a vertical or yielding movement and thereby permit a feed-roll mountd upon the said shaft to accommodate itself to counters of varying thicknesses. The feed-roll referred to is preferably made as herein shown and consists of a plurality of toothed or serrated wheels or disks 1), (see Fig. 4,) mounted upon the shaft 0, and secured thereon, so as to leave spaces between the adjacent disks for the passage between them of presser-fingers 19, secured to or forming part of levers 6 mounted upon a pivot or rod 5 supported at its opposite ends in side bars or links I) of a frame pivotally mounted, as at 12 to the uprights a 0.

Each of the levers b is spring-pressed at its rear end, and in the present instance each lever has pivotally secured to it a rod 19 extended through a suitable hole in the bar or frame I) and encircled by a spring 19 the tension of which is regulated by a nut 12 on the threaded end of the rod 1). The presser-fingers and the sectional feed-roll cooperate together to hold the counter-blank which is be ing cut firmly down upon the matrix, so as to effect a more efficient skiving of the blank b (Shown in Fig. 5.) The counter-blanks Z9 (shown in section in Fig. 5 and by dotted lines in Fig. 1) are preferably automatically fed to the matrix by means of a feed mechanism preferably made as herein shown and consisting of a bar or plate I), (see Figs. 1 and 3,) secured to or forming the upper surface of a sliding bar I), the plate Z9 being movable in suitable guides Z9 in the sides of a box or receptacle F9 for the counterblanks, the sliding plate Z2 being reciprocated, as herein shown, by means of a connecting rod I9 joining cranks Z9 on the shaft a to a pin or projection Z9 adj ustably secured to the sliding bar 5 the said pin or projection 19 being extended through a slot 19 in the sliding bar and secured thereto by a nut Z1 The counter-blanks 11 to be skived are placed in the box Z9 at one end, and the feed bar or plate Z1 is made of substantially the same thickness as a blank and acts upon the lowermost of the said blanks, so as to project the same from the box Z9 forward onto the matrix, the said blank being supported outside of the box 19 by an extension of the bottom plate of the box until the blank is seized by the feed-roll and matrix. The reciprocation of the feedbar 19 and the rotation of the matrix-wheel a are so timed that the counter-blank will be fed from the box, so as to rest in proper po sition on thematrix and be engaged by the latter and the presser-fingers and feed-roll, so that on the continued revolution of the matrix-wheel the counter-blank Will be held firmly onto the matrix, and as the matrix and the feed-roll b are rotated in opposite directions the counter-blank will be gripped by the roll and the matrix and be carried forward with the matrix, and when the blank has been carried beyond the feed-roll b it is acted upon by the rotating hoop knife ctflwhich cuts the blank transversely from one longitudinal side to the other, removing two substantially Wide scarfs, as represented by the dotted lines in Fig. 5. By reason of the recess a of the matrix being of greater depth at its center than at its sides the center of the counter is left of greater thickness than its sides or edges, so that increased flexibility is imparted to the counter at its sides or edges, While the center portion of the counter is left of greater thickness to give it the desired stiffness.

In the operation of the machine herein shown the circular or hoop knife is subjected to severe usage, and in order that the cutting edge a of the hoop knife may be sharpened without interfering with its operation we have provided the machine with a grinder for the knife, which grinder, as herein shown, consists of an emery or other suitable wheel 0, (see Fig. 6,) mounted on a shaft having bearings in a yoke or frame 0 provided with an arm 0 adj ustably secured in a block ciwhich is clamped to the substantially flat end 0 of a rod or pin 0 extended through the hub c on an upright 0 fastened to the frame A, as by bolts 0 the said upright being provided, as herein shown, with an arm 0 which is secured to the frame,as by a bolt 0 (See Fig. 1.) The rod 0 is adj ustably secured in the hub c by means of a set-screw 0 and the block 0 is secured to the flattened end 0 of the rod 0 by a screw-threaded bolt 0, extended up through the block 0 and the flattened end 0 and engaged by a hand-nut 0 The arm 0 of the yoke c is preferably made dovetailed, as represented in Fig. 10, so as to enter a dovetailed recess 0 in the block 0 and the said arm is adjustable in its dovetailed recess by means of a hand-screw c1 extended through the end of the block a and into a threaded socket 0 in the arm The dovetailed arm e is adapted to be rendered fast to the block 0 by a set-screw e and a shim The bolt 0 is provided with a round head, as represented in'Figs. 9 and 10, so that the block 0 may be turned on the said bolt as a pivot after the clamping-nut 0 has been loosened, which permits the yoke to be turned on the bolt 0 as a pivot, and thereby permits the grinding-tool to be engaged with both sides of the knife-edge, to thereby provide the cutting edge with two different bevels. The shaft 0 is longitudinally movable in the arms of the yoke c to withdraw the grinding-wheel c from engagement with one side of the knife-edge and permit it to be engaged with the other side of said edge. The block 0 may be positively locked against rotation by means of a threaded pin or bolt 0 which extends through the flattened portion 0 of the bar 0 and into a suitable socket 0 in the block a The shaft 0 is rotated, as herein shown, by means of a belt e passed about a small pulley 0 on the shaft 0 and about a substantially large pulley e on a shaft Z9 having bearings in suitable brackets or arms 0 0 secured to the side of the frame A, as by bolts 0 0 the said shaft having mounted upon it a substantially small pulley e in line with the pulley c on the knife-shaft a, and about which latter pulley is passed a suitable belt. (Not herein shown.) The matrix-wheel a has cooperating with it a counter-dischargin g chute d, which is provided with a curved portion, (shown by dotted lines in Fig. 1,) which is projected into the revolving hoop knife at the rear of its cutting edge and which also embraces the matrix-Wheel, so that the counter which has been skived is directed by the rotation of the matrix-wheel into the curved upper portion of the chute d The gearing herein shown and described, 7

which connects the matrix-supporting wheel a with the main or driving shaft, permits the said matrix-wheel to be moved, as specified, to obtain the proper adjustments of the Wheel with relation to the circular hoop knife.

l/Ve claim 1. In a counter-skiving machine, the combination of the following instrumentalities, viz: a circular or hoop knife, a substantially semispherical holder or support for the said knife provided with a hub, a rotatableshaft on which the hub of said support is secured.

to rotate therewith,a matrix-su pportin g Wheel projected into the circular hoop knife and revolving in a plane substantially at right angles to the plane of rotation of the circular hoop knife and provided with a matrix of greater depth at its center than at its sides, and a feed-roll to hold the counter-blank in engagement with the matrix while it is being cut transversely by the revolving circular or hoop knife, substantially as described.

2. In a counter-skiving machine, the combination of the following instrumentalities, viz: a matrix-wheel revolving in a substantially vertical plane, a circular or hoop knife revolving in a plane substantially at right angles to the plane of revolution of the matrixwheel, a presser-roll cooperating with the matrix-wheel, and a rotating grinder cooperating with the said circular or hoop knife, a shaft on which it is mounted, and a movable support for said shaft to permit the rotating grinder to be engaged with both sides of the circular hoop knife, substantially as described.

3. In a counter-skiving machine, the combination of the following instrumentalities, viz: a rotatable circular or hoop knife, a matrix-wheel revolving within the said circular knife in a plane substantially at right angles to the plane of revolution of thesaid knife, and a support for said matrix-wheel composed of parts adjustable in three different directions to adjust the said matrix-wheel radially in vertical and horizontal directions and axially within the circular knife, substantially as described.

4. In a counter-skiving machine, the combination of the following instrumentalities, viz: a rotatable circular hoop knife, 3. rotatable matrix-wheel provided with a detachable matrix having a recess in its periphery of varyingdepths and rotatable within the said hoop knife in a plane substantially at right angles to the rotatable circular knife, a feedroll composed of a plurality of toothed wheels,

and presser-fingers extended between said toothed wheels to engage the counter-blank, substantially as described.

5. In a counter-skiving machine, the combination of the following instrumentalities, viz: a rotatable circular hoop knife, arotatable matrix-wheel provided with a detachable matrix having a recess in its peripheryof varying depths and rotatable within the said hoop knife in a plane substantially at right angles to the rotatable circular knife, a feedroll composed of a plurality of toothed wheels, and presser-fingers extended between said toothed wheels to engage the counter-blank, a box or receptacle for the counter-blanks, and an automatically-operated feed for the counter-blanks, substantially as described.

6. In a counter-skiving machine, the combination of the following instrumentalities, viz: a matrix-wheel provided with a detachable matrix having its periphery provided with a counter-receiving recess of unequal depths, a feed-roll cooperating with said matriX wheel, a receptacle for the counterblanks, an automatically-operated feed mechanism movable in said receptacle, and a knife movable transversely over the said matrix and curved to skive both sides of the coun-' ter-blank in one operation, substantially as described.

7. In a counter-skiving machine, the combination of the following instrumentalities, viz: a matrix-wheel provided with a counter receiving recess of unequal depths, a feedroll cooperating with said matrix-wheel, a receptacle for the counter-blanks, an automatically-operated feed mechanism movable in said receptacle, a knife movable transversely over the said matrix and curved to skive both sides of the counter-blank in one operation, and a discharge-chute having its upper end curved to embrace the matrix-wheel at the rear of the cutting edge of the knife, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

MILTON CHASE. MATTHEW H. FOSTER.

WVitnesses:

FRANK N. RAND, MELLEN A. PINGREE. 

